Steam-generator.



wihwooeo R. J. GALBRAITH:

STEAM GENERATOR.

APPLIOATIOH FILED AUG. 7, 190a.

Patented June 14,1910.

2 SHEETS-SHEET 1.

R. J. GALBRAITH STEAM GENERATOR. APPLICATION FILED AUG. 7, 1908.

Patented June 14, 1910.

2 8HEETS-BHEET 2.

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ROBERT J. GALBltAITI-I; E ALBANY, OREGON.

STEAM-GENERATOR.

Specification of Letters Patent. Patented June Ltd. igjilh Application filed August 7, 1908. Serial No. 447,432.

To all whom it may concern:

Be it known that I, Bonner J. GALBRAITH, acitizen of the United States, residing at Albany, in the county of Linn. State of Oregon, have invented certain new and useful Improvements in Steam-Generators; and I do hereby declare the following to he a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the some.

I This invention relates to steam generators and'has for one of its objects to'improve thh construction and increase the efficiency and economy of operation of devices of this character;

Another object of the invention is to provide a device of this character wherein the Water is distribhted in thin sheets throughout, the interior of the generator and rapidly circulated and subjected to the infi uenceof the fire in that condition, whereby the units 40f heat are thoroughly utilized and increased economy in the use of the fuel therebyefliected.

.With these and other objects in view the invention onsists in a generator formed of two inner heads spaced apart and comprising the ends of the fuel Cllllllllliil,lLWOOlllZGl heads spaced-from the inner heads and coupled thereto to form water spaces therebetween, water tubes connecting the inner heads, fines connecting the outer heads and extending through the water tubes. and a jacket surrounding the spaced heads and their tubes and fines, whereby the Water is ar ranged in thin sheets throughout the entire Water space inthe generator and subiected to the influence of the heat in that position. The invention further consists in certain novel features of construction as hereafter shown and described and then specifically pointed out in the claim, and in the drawings illustrating the preferred embodiment of the invention, Figure 1 a rear elevation, with the shell in section. Fig. 3 a front elevation, with the smoke arch and shell detached. Fig. 3 is a vertical longitudinal section on the line 3-"3 of 2. Fig. 4: is a transverse section on the line of Fig. 3. The improved device comprises two inner heads 'l0-11 and two outer heads 12--13,

the heads 11.13 disposed at the forward end of the generator and the heads ill-12 disposed at therear end of the generator, the heads ll-l3 being spaced a relatively. short distance apart, and the heads 10-li 5 being likewise spaced av corresponding distnnce as shoivn. The heads formed respectively with upwardly extending cortions ld-l5 and 16-17. The heads ill-12 including the extensions lei--16 are connectedhy a ring or band 18, while the heads 1l--13 including the extensions 15-1? are likewise connected by e ring band 19. llhc heads l113 are pierced contrally y apertures 20-21, surrounded by '1 connecting ring and with an annular member 23 fitting within the openings and extending beyond the head 13 and consti tuting the fuel opening of the generator. The exthhsions lli-1T are pierced to receive the ends of a relatively large tube or pipe 24, the tube being strengthened etits juncture with. the extensions by flanges 25-26 riveted to the extensions at BY-28 and into which the ends of the tube are threaded, as shown. The relatively large tube or pipe'i'zt constitutes the steam chamber or dome of the. generator. The heads l01l are also each provided with a series of openings arranged in circles and. into which medium sized tubes 2 are secured, the large tubes 24 and the medium sized tubes 29 thus providing communication between the spaces or water legs between the heads, as here otter explained. The outer heads lit--13 are also pierced opposite the openings for the tubes 29 by smaller openin 's, and se cured to the outer heads and surrounding these latter openings and riveted to the heads, are flanges 3l.352 into which smaller fines 33 are secured preferably by threading. and extending through the medium sized tubes 29 and providing communication ontirely through the generator, as shown.

Surrounding the spaced heads including the extensions and s oaced therefrom is s shell formed of a bony or side portion 34-, a rec r head 35 and a front head the front head having an opening corresponding to end. surrounding the fuel opening, While smoke stack 37 extends from the front 36- of the shell, as shown.

Connected by flanges 38--39 to the lower portions of the heads lO-11 and 12-43 and their rings 18-19 are vertical members 1O-4l spaced apart and forming the ash pit for the generator. The members 4:1 also serve as supports for the generator, and are formedwith lateral flanges 42-43 at their lower ends to increase the stability.

The heads 10-12 are connected by numerous stay bolts 44: while the heads 11-13 are likewise supported by similar stay bolts 45.

The tubes 29 are arranged relatively close, and serve as grate bars, the fire being built directly on the tubes, and enwrapping all the outer surfaces thereof, passes to the shell 3st and thence through the smaller flues and thence through the stack 37. The water filling the spaces between the heads 10-12 and 11-13 and also filling the spaces between the tubes 29 and .fi'ues 30 is thus arranged. in thin sheets throughout the whole generator, and caused to circulate rapidly.

The intake for the water is shown at 46,- and the outlet is arranged to lead from the larger tube 24 as shown at 47.

The shell or jacket 34 is shut oil opposite the forward head 13 as shown at 4-8 so that the products of the combustion are forced to pass around the rear heads 10-42 and into the smoke arch formed by the end 85 of the shell and thence through the lines into the forward smoke arch 36 before they can reach the stack 37. The products of the combustion are thus caused to traverse over the whole surface of all the water tubes be fore they reach the jacket and. thence travel in their return passage through the fines. The heat generated or radiated by the fuel is thus utilized to the fullest extent, and all waste obviated. The jacket or shell will be covered with suitable protecting material such as asbestos or other non-conducting covering, as shown at 49.

The generator may be formed in any desired size but for an ordinary generator the heads will be about four feet in diameter and the tubes and fines about ten feet long, but it will be understood that the boiler may be formed of any desired size or in any desired proportions, and the invention therefore is not limited to any proportions or size.

The bolts connect the outer heads 1213 through the larger flue 24, as shown, to strengthen the structure.

What is claimed, is 1-- A steam generator comprising inner heads spaced apart and each provided with an upwardly directed extension, outer heads spaced from said inner heads and each provided with an upwardly directed extension, connecting means between each inner head and its extension and theadjacent outer head and its extension and arranging the heads in pairs at each end of the generator, one'of said spaced pairshaving a fuel opening therethroug i, a plurality of relatively small tubes connecting the inner heads near their peripheries and spaced slightly apart with the tubes nearest-the extensions spaced a greater distanceapart, a plurality of fines connecting the outer heads and extending through the tubes which connect the inner heads, and a relatively large tube connecting the extension of the inner heads and above the large space between the upper tubes.

In testimony whereof, I affix my signature, in presence of two witnesses.

Witnesses:

E. R. BRYSON, LENA FLEET. 

